Stability of Immobilization of Bipyridine‐proline on Zn‐Modified Bimodal Mesoporous Silicas and Recyclable Catalytic Performance in Asymmetric Aldol Reaction

2019 ◽  
Vol 4 (11) ◽  
pp. 3105-3112 ◽  
Author(s):  
Yajing Zhang ◽  
Jihong Sun ◽  
Shiyang Bai ◽  
Hongwu Zhao ◽  
Xia Wu ◽  
...  
Keyword(s):  
Aldol Reaction ◽  
Catalytic Performance ◽  
Mesoporous Silicas ◽  
Asymmetric Aldol ◽  
Asymmetric Aldol Reaction

scholarly journals Straightforward Immobilization of Phosphonic Acids and Phosphoric Acid Esters on Mesoporous Silica and Their Application in an Asymmetric Aldol Reaction

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 249 ◽  
Author(s):  
Christian Weinberger ◽  
Tatjana Heckel ◽  
Patrick Schnippering ◽  
Markus Schmitz ◽  
Anpeng Guo ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Phosphoric Acid ◽  
Surface Area ◽  
Aldol Reaction ◽  
Synthesis Method ◽  
Mesoporous Silicas ◽  
Phosphonic Acids ◽  
Asymmetric Aldol ◽  
Asymmetric Aldol Reaction ◽  
Acid Esters

The combined benefits of moisture-stable phosphonic acids and mesoporous silica materials (SBA-15 and MCM-41) as large-surface-area solid supports offer new opportunities for several applications, such as catalysis or drug delivery. We present a comprehensive study of a straightforward synthesis method via direct immobilization of several phosphonic acids and phosphoric acid esters on various mesoporous silicas in a Dean–Stark apparatus with toluene as the solvent. Due to the utilization of azeotropic distillation, there was no need to dry phosphonic acids, phosphoric acid esters, solvents, or silicas prior to synthesis. In addition to modeling phosphonic acids, immobilization of the important biomolecule adenosine monophosphate (AMP) on the porous supports was also investigated. Due to the high surface area of the mesoporous silicas, a possible catalytic application based on immobilization of an organocatalyst for an asymmetric aldol reaction is discussed.

A phosphotungstic acid-supported multifunctional organocatalyst containing 9-amino(9-deoxy)epi-cinchonidine and Brønsted acid and its application in asymmetric aldol reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 55894-55902 ◽  
Author(s):  
Ling Lan ◽  
Guangxin Xie ◽  
Tao Wu ◽  
Dandan Feng ◽  
Xuebing Ma
Keyword(s):  
Phosphotungstic Acid ◽  
Aldol Reaction ◽  
Catalytic Performance ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Asymmetric Aldol ◽  
Brönsted Acid ◽  
Asymmetric Aldol Reaction ◽  
First Time ◽  
Excellent Catalytic Performance

Phosphotungstic acid-supported multifunctional 9-amino(9-deoxy)epi-cinchonidine containing Brønsted acid was developed through facile precipitation for the first time and afforded aldol adducts in excellent catalytic performance with good reusability.

ChemInform Abstract: Asymmetric Aldol Reaction of Dichloroacetaldehyde Catalyzed by Diarylprolinol.

ChemInform ◽  
2016 ◽  
Vol 47 (49) ◽  
Author(s):  
Yujiro Hayashi ◽  
Daichi Nakamura ◽  
Yusuke Yasui ◽  
Kotaro Iwasaki ◽  
Hiroaki Chiba
Keyword(s):  
Aldol Reaction ◽  
Asymmetric Aldol ◽  
Asymmetric Aldol Reaction
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